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Youngia
Taxonomy
Youngia was named by Lindström (1885) [Sepkoski's age data: S Ldov-m].
It was assigned to Phacopida by Sepkoski (2002); and to Cheiruridae by Jell and Adrain (2002).
It was assigned to Phacopida by Sepkoski (2002); and to Cheiruridae by Jell and Adrain (2002).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1885 | Youngia Lindström |
| 2002 | Youngia Jell and Adrain p. 462 |
| 2002 | Youngia Sepkoski |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Youngia Lindström 1885
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†Youngia boucoti Chatterton and Perry 1984
†Youngia johnsoni Chatterton and Perry 1984
†Youngia kathyae Chatterton and Perry 1984
†Youngia steineri Chatterton and Perry 1984
†Youngia trispinosus Young 1868
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009 | |||||
Age range: base of the Ashgill to the top of the Ludfordian or 449.50000 to 422.70000 Ma
Collections (31 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ashgill | USA (Nevada) | Y. sp. (359) | |
| Rhuddanian - Aeronian | Greenland | Y. sp. (12937) | |
| Llandovery | Canada (Northwest Territories) | Y. boucoti, Y. johnsoni (26031 26037) Y. johnsoni (26036) Y. kathyae (26032 26039) Y. steineri (26040) | |
| Llandovery - Wenlock | Canada (Northwest Territories) | Y. steineri (26034 26041 26047) | |
| Aeronian | United Kingdom (Scotland) | Y. trispinosa (188535 188538) | |
| Aeronian | Czechia | Y. sp. (14085 14087 14122) | |
| Aeronian | United Kingdom (England) | Y. moroides (50286 50289) | |
| Telychian | USA (Iowa) | Y. sp. (24963) | |
| Telychian | United Kingdom (Scotland) | Y. douglasi (23308 188545) Y. sp. (170694) | |
| Telychian | Australia (Queensland) | Y. sp. (40018) | |
| Telychian | Canada (Northwest Territories) | Y. kathyae (26033) Y. walli, Y. boucoti, Y. kathyae (26044) | |
| Telychian - Sheinwoodian | USA (Iowa) | Y. sp. (26720 26769) | |
| Sheinwoodian | Canada (Northwest Territories) | Y. sp. (26005) | |
| Gorstian | Canada (Nunavut) | Y. sp. 1, Y. sp. 2 (26008) | |
| Ludlow | Russian Federation | Y. uralica (24691) | |
| Ludfordian | Uzbekistan | Y. alaica (216475) |